The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2025
Filed:
Feb. 10, 2021
Apple Inc., Cupertino, CA (US);
Haitong Sun, Cupertino, CA (US);
Dawei Zhang, Saratoga, CA (US);
Wei Zeng, Saratoga, CA (US);
Yushu Zhang, Beijing, CN;
Hong He, San Jose, CA (US);
Chunxuan Ye, San Diego, CA (US);
Huaning Niu, San Jose, CA (US);
Weidong Yang, San Diego, CA (US);
Oghenekome Oteri, San Diego, CA (US);
Jie Cui, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
The present disclosure relates to apparatus, methods, computer-readable storage medium and computer program product for CSI-RS enhancement for Port Selection Codebook with Channel Reciprocity. A cellular base station, comprising: at least one antenna; at least one radio coupled to the at least one antenna; and a processor coupled to the at least one radio; wherein the cellular base station is configured to: provide a Radio Resource Control (RRC) message to a wireless device; and provide a Channel State Information-Reference Signal (CSI-RS) to the wireless device via one or more ports based on the RRC message, wherein, the RRC message at least indicates one or more of: information on a density of the CSI-RS, information on time domain locations of the CSI-RS, information on a subset of ports for the wireless device to measure the CSI-RS, and information on a subset of Code Division Multiplexing (CDM) groups for the wireless device to measure the CSI-RS.